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MOD 8: Lecture 1
TMJ
| Question | Answer |
|---|---|
| these bony processes are all part of what TMJ bone... Postglenoid spineMandibular fossaArticular eminenceArticular crestArticular tubercle | temporal bone |
| these bony processes are all part of what TMJ bone... Medial poleLateral poleHead, neck, body, teethRamusCoronoid process | mandible |
| Positioned between mandibular condyle and temporal bone – Divides into superior and inferior compartments | articular disk |
| What are the three bands of the articular disk called? | Anterior (pes mensicus)Intermediate (pars gracilus)Posterior (pars posterior) |
| What type of tissue is the articular disk made up of? | Dense fibrous connective tissue |
| What are the medial and lateral attachments of the articular disk? | Attached to medial and lateral poles by medial and lateral collateral ligaments |
| What are the posterior superior parts of the articular disk attached to? | superiopr lamina or stratum |
| What are the posterior inferior disc attaches to? | inferior lamina or stratum |
| What does the anterior portion of the disc attach to? | Anterior attachment to capsule and superior fibers of the superior lateral pterygoid |
| What does the superior part of the joint capsule of the TMJ attach to? | rim of temporal articular surfaces |
| What does the inferior part of the joint capsule of the TMJ attach to? | condylar neck |
| Which part of the capsule becomes TMJ ligament? | lateral part |
| The anterior part of the TMJ capsule blends with the anterior disk and what muscle? | lower head of external pterygoid |
| What does the posterior capsule attach near? | attaches near postglenoid spine |
| What is the TMJ innervated by? | Auriculotemporal branch of 3rd division of trigeminal nerveMasseteric nervePosterior deep temporal nerve |
| What happens during phase 1 of mandibular depression? | Rotation for first 10-15 mm before mandibular opening enters next phase |
| What happens during phase 2 of mandibular depression? | Anterior translation of the condyle. Allow for functional opening of 40 mm |
| What happens during protrusion? | Bilateral anterior condylar translation |
| What happens during lateral excursion? | Anterior translation on contralateral side and spin on ipsilateral side |
| At the end of phase 1, what position is the disk in? | the disc is more posteriorly rotated position in relation to condyle |
| What are the two theories in regard to the arthrokinematics of phase 2? | Superior stratum becomes tight as the condyle and disc translate anterior ORDisc is affected by its own self-seating, disc is rotated further posteriorly on condyle |
| Phase 1 for treatment of TMJ disorders | Inflammatory conditions, Part A/B |
| Phase 2 for treatment of TMJ disorders | Cervical spine disorders causing inflammatory process. |
| Phase 3 for treatment of TMJ disorders | Intraoral appliance to treat inflammation. |
| Phase 4 for treatment of TMJ disorders | Anterior repositioning appliance. |
| Phase 5 for treatment of TMJ disorders | Manual intraoral techniques to restore mandibular dynamics. |
| Phase 6 for treatment of TMJ disorders | Arthroscopy to restore translation between disc and temporal bone. |
| Phase 7 for treatment of TMJ disorders | Open joint surgery. |
Created by:
PTROCKS
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